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? asked in Science & MathematicsMathematics · 7 years ago

What is the modulus of 5-3i?

Need help with a math problem...what is the modulus of 5 - 3i ?

3 Answers

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  • Herp-da-Derp
    Lv 5
    7 years ago
    Favorite Answer

    Hi,

    Recall absolute value gives distance to the origin.

    We have |5-3i|

    = sqrt(Re(5-3i)^2 + Im(5-3i)^2)

    = sqrt(5^2 + (-3)^2)

    = sqrt(25 + 9)

    = sqrt(34)

  • Jay
    7 years ago

    draw the graph

    (5,-3)

    find the length from center to (5,-3)

    by Pythagoras’ theorem.

    3²+5²=9+25=34

    modulus is (34)^1/2

  • Colin
    Lv 7
    7 years ago

    sqrt(5^2 + (-3)^2)

    sqrt(25 + 9)

    sqrt(34) <<<

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